X0508 4 2026-01-27 0 0001405495 InterDigital, Inc. IDCC 0001854214 Chen Lawrence Liren 200 BELLEVUE PARKWAY SUITE 300 WILMINGTON DE 19809 1 1 0 0 President and CEO 1 Common Stock 2026-01-27 4 S 0 392 324.58 D 158643.008 D Common Stock 2026-01-27 4 S 0 532 325.58 D 158111.008 D Common Stock 2026-01-27 4 S 0 960 326.95 D 157151.008 D Common Stock 2026-01-27 4 S 0 3332 328.16 D 153819.008 D Common Stock 2026-01-27 4 S 0 702 329.04 D 153117.008 D Common Stock 2026-01-27 4 S 0 40 331.16 D 153077.008 D The transactions reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted on September 29, 2025. The number of securities reported represents an aggregate number of shares sold in multiple open market transactions over a range of sales prices ranging from $324.29 to $325.11 per share. The price reported represents the weighted average price. The Reporting Person undertakes to provide to the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares sold by the Reporting Person at each separate price within the ranges set forth in this footnote and in footnotes 3 through 6. The number of securities reported represents an aggregate number of shares sold in multiple open market transactions over a range of sales prices ranging from $325.31 to $325.98 per share. The price reported represents the weighted average price. The number of securities reported represents an aggregate number of shares sold in multiple open market transactions over a range of sales prices ranging from $326.65 to $327.45 per share. The price reported represents the weighted average price. The number of securities reported represents an aggregate number of shares sold in multiple open market transactions over a range of sales prices ranging from $327.78 to $328.75 per share. The price reported represents the weighted average price. The number of securities reported represents an aggregate number of shares sold in multiple open market transactions over a range of sales prices ranging from $329.00 to $329.10 per share. The price reported represents the weighted average price. /s/ Ariel E. Greenstein, Attorney-in-Fact for Lawrence Liren Chen 2026-01-28